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Development and quarter core PWR rod ejection accident application of the TITAN code. Final report 1982-83

Technical Report ·
OSTI ID:6921874
New features have been added to TITAN, which is an advanced 3-D thermohydraulic and neutronic coupled code. The new features include a high order feedback model, a xenon model and a capability to handle nonreactangular (zig-zag) geometry. A central rod ejection accident of a typical 3-loop PWR within 0.1 seconds, was simulated with a quarter-core model, comprising 47 assemblies. The results seem reasonable, although different from MEKIN-B results, reported by BNL. The steady state solutions with and without cross-flow were found to have no significant differences. The calculational speed on the Honeywell Multics machine was roughly .4 cpu seconds (about 1500 cpu seconds on IBM 370/160) for convergence. The transient results show power peaking after 0.12 seconds at about 1.50 the initial power, as opposed to the results predicted by MEKIN-B of a factor of 2.0 rise in power. A user's guide is given as an Appendix to the report.
Research Organization:
Massachusetts Inst. of Tech., Cambridge (USA). Energy Lab.
OSTI ID:
6921874
Report Number(s):
PB-84-169754; MIT/EL-83-007
Country of Publication:
United States
Language:
English